(19)

(11)

EP 1 221 058 A1

(12)

(43) Date of publication: 10.07.2002 Bulletin 2002/28 (21) Application number: 00950612.2 (22) Date of filing: 24.07.2000

(51) International Patent Classification (IPC)7: G01S 13/42 (86) International application number: PCT/US0020/111 (87) International publication number: WO 0109/641 (08.02.2001 Gazette 2001/06)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 30.07.1999 US 365307 (71) Applicant: Litton Systems Inc. Agoura Hills,California 91376-6008 (US)	(72) Inventor: ALON, Yair Thousand Oaks, CA 91362 (US) (74) Representative: Butcher, Ian James et al A.A. Thornton & Co.235 High Holborn London WC1V 7LE London WC1V 7LE (GB)